Lahmari is a youth academy graduate of
Paris Saint-Germain. She made her senior debut for the club on 22 March 2015 by scoring a goal in a 2–0 away win against
Glasgow City in the quarter-finals of
UEFA Women's Champions League. However, she struggled to find playing time at the capital club in following seasons and was loaned out to
Reading,
Paris FC and
Soyaux. She announced her departure from Paris Saint-Germain in May 2019 after contract expiration. On 30 August 2023, Lahmari joined Spanish club
Levante Las Planas. In July 2024, she joined
Levante UD. On 28 August 2025, Lahmari joined Moroccan record-winning club
AS FAR. In January 2026, she played in the semifinal of the inaugural
FIFA Women's Champions Cup against
Arsenal. ==International career==